| 2 | ÷ | 5 | × | ( | X | + | 3 | ) | − | 3 | ÷ | 2 | × | ( | X | − | 4 | ) | = | 5 | ÷ | 4 | × | X | + | 6 | ÷ | 5 |
| 方程左边 = | 2 5 | ( | X | + | 3 | ) | − | 3 2 | ( | X | − | 4 | ) |
2 5 | ( | X | + | 3 | ) | − | 3 2 | ( | X | − | 4 | ) | = | 5 | ÷ | 4 | × | X | + | 6 | ÷ | 5 |
| 方程左边 = | 2 5 | X | + | 2 5 | × | 3 | − | 3 2 | ( | X | − | 4 | ) |
| = | 2 5 | X | + | 6 5 | − | 3 2 | ( | X | − | 4 | ) |
| = | 2 5 | X | + | 6 5 | − | 3 2 | X | + | 3 2 | × | 4 |
| = | 2 5 | X | + | 6 5 | − | 3 2 | X | + | 6 |
| = | - | 11 10 | X | + | 36 5 |
| - | 11 10 | X | + | 36 5 | = | 5 | ÷ | 4 | × | X | + | 6 | ÷ | 5 |
| 方程右边 = | 5 4 | X | + | 6 5 |
| - | 11 10 | X | + | 36 5 | = | 5 4 | X | + | 6 5 |
| - | 11 10 | X | − | 5 4 | X | = | 6 5 | − | 36 5 |
| - | 47 20 | X | = | 6 5 | − | 36 5 |
| - | 47 20 | X | = | - | 6 |
| 6 | = | 47 20 | X |
47 20 | X | = | 6 |
| X | = | 6 | ÷ | 47 20 |
| = | 6 | × | 20 47 |
| X | = | 120 47 |
| X | = | 2.553191 |